Hi, I have an Excel (Windows) one that is based on Smart’s formulae as reported by Jan Meuss. This is simpler (!) than Meuss’s ‘better’ one but nevertheless it is accurate to a maximum of 4 secs and usually to within 1 sec. The spreadsheet calculates all leap year days every year but in years without a leap year the values for the 29th Feb and 1 Mar show the same.
In 2012 I made an accurate comparison of this formula with the true one (not against Meuss’s higher accuracy formula) and the error curve was this: Not sure this is what you might be looking for but if you’d like this just say. Regards Patrick From: Dan-George Uza Sent: Tuesday, October 25, 2016 5:38 PM To: [email protected] Subject: Solar Declination Hello, Can you provide a free accurate spreadsheet for the calculation of daily solar declination across a leap year as well as non-leap year? Thanks, Dan Uza -------------------------------------------------------------------------------- --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
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